The National Right to Life web page has this useful summary of the special U.S. House elections that will be held in the last months of 2013. The article also includes the special U.S. Senate election in New Jersey.

All of the remaining 2013 special congressional elections will have minor party or independent candidates on the ballot, with the possible exception of the Alabama race. Whether any candidate outside the major parties appears on the Alabama election will depend on the outcome of a pending lawsuit.